Emit a wifi signal with arduino

Hi everyone,

I have a project where I want to see my arduino with a wifi connection.
I don't want to transmit some data with this wifi emit, I just want to see that this arduino is not far from me with a tablet.

I maybe forgot some important information, if you have some questions I'm here to answer you.

Thank's for your help !

The Arduino by itself is not a radio. It can't "emit a WiFi signal".